主数据库配置示例
vim /etc/my.cnf：
# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html
[mysqld]
#
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
#
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
#
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
server-id=1 #数据库唯一ID，主从的标识号绝对不能重复。
log-bin=mysql-bin #开启bin-log，并指定文件目录和文件名前缀
binlog-do-db=master_db#需要同步的数据库。如果是多个同步库，就以此格式另写几行即可。如果不指明对某个具体库同步，就去掉此行，表示同步所有库（除了ignore忽略的库）。
binlog-ignore-db=mysql #不同步mysql系统数据库。如果是多个不同步库，就以此格式另写几行；也可以在一行，中间逗号隔开。
sync_binlog = 1 #确保binlog日志写入后与硬盘同步
binlog_checksum = none #跳过现有的采用checksum的事件，mysql5.6.5以后的版本中binlog_checksum=crc32,而低版本都是binlog_checksum=none
binlog_format = mixed #bin-log日志文件格式，设置为MIXED可以防止主键重复。
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
# Recommended in standard MySQL setup
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
从数据库配置示例
vim /etc/my.cnf：
# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html
[mysqld]
#
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
#
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
#
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
server-id=2 #设置从服务器id，必须于主服务器不同
log-bin=mysql-bin #启动MySQ二进制日志系统
#如果需要同步的数据库名相同
#replicate-do-db=zxkang_sync #需要同步的数据库名。如果不指明同步哪些库，就去掉这行，表示所有库的同步（除了ignore忽略的库）。
#
##如果需要同步的数据库名不同
replicate-rewrite-db=vat_db->aa # master 上的数据库名为 zxkang_sync ， slave 上的库名为 test
replicate-wild-do-table = aa.sys_permission
replicate-wild-do-table = aa.sys_permission_role
replicate-wild-do-table = aa.sys_role
replicate-wild-do-table = aa.sys_role_user
replicate-wild-do-table = aa.sys_user
#replicate-wild-rewrite-table = test_master.ts_task_type->test_slave.ts_task_type
#
replicate-ignore-db=mysql #不同步mysql系统数据库
slave-skip-errors = all #跳过所有的错误错误，继续执行复制操作
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
# Recommended in standard MySQL setup
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
同步设置：
1、主数据库
查看状态：show master status；
结果：
2、从数据库
a、停止slave：stop slave；
b、设置同步：
CHANGE MASTER TO MASTER_HOST='主数据库IP',MASTER_USER='root',MASTER_PASSWORD='123456',MASTER_LOG_FILE='mysql-bin.000008',MASTER_LOG_POS=604046735;
c、重启slave：
start slave；
3、重启数据库
service mysqld restart；
4、查看同步情况：
show slave status：
